Ottescience MH-2800D Multi-Function Dry Block Thermostat

Overview

The Ottescience MH-2800D Multi-Function Dry Block Thermostat is an engineered thermal platform designed for precise, repeatable temperature control in analytical and preparative laboratory workflows. Unlike water baths or circulating ovens, this dry block system delivers rapid thermal equilibration and minimal cross-contamination risk through direct conductive heating of interchangeable aluminum or stainless-steel heating blocks. Its core operating principle relies on PID-controlled resistive heating elements embedded within a thermally optimized aluminum housing, coupled with high-resolution dual-display digital temperature regulation (PV = actual temperature; SV = setpoint). The MH-2800D extends the MH-2800A platform with integrated programmable timing functionality—enabling unattended operation for standardized incubation, enzyme inactivation, sample denaturation, or reagent pre-warming protocols across QC, clinical, and research laboratories.

Key Features

• Intelligent dual-display temperature controller with independent PV (red) and SV (green) 4-digit LED readouts for real-time monitoring and precise setpoint adjustment
• Programmable timer function (1–999 minutes) with visual TIME indicator and clear “—” status display when disabled—supports both timed and continuous operation modes
• Thermal stability of ±0.1 °C and accuracy of ±0.15 °C across the full operating range (ambient +5 °C to 200 °C), validated per ISO/IEC 17025 calibration practices
• Dual safety architecture: hardware-based upper-limit cutoff at 200 °C and software-configurable deviation alarm triggered when measured temperature exceeds setpoint by >5 °C
• Modular block configuration supporting two standard-format blocks (e.g., for 0.2 mL, 0.5 mL, 1.5 mL, or 2.0 mL tubes) or one extended double-size block for larger vessels or multi-well plates
• Robust mechanical design with 400 W heating power, 220 V / 50 Hz input, and compact external footprint (240 × 92 × 215 mm) suitable for benchtop integration in regulated environments

Sample Compatibility & Compliance

The MH-2800D accommodates a wide range of sample containers—including microcentrifuge tubes, PCR strips, glass vials, and shallow-well microplates—via user-selected heating blocks with precision-machined wells. Its dry-block architecture eliminates liquid evaporation, condensation, and microbial growth concerns associated with water-based systems, making it suitable for GLP-compliant sample preparation prior to HPLC, GC, ELISA, or nucleic acid analysis. While not certified to IEC 61010-1 as a standalone medical device, the unit meets general electrical safety requirements for laboratory equipment used in non-invasive analytical applications. Temperature performance data can be documented for internal audit trails, and the device supports manual calibration verification using NIST-traceable reference thermometers—aligning with FDA 21 CFR Part 11 expectations for instrument qualification in pharmaceutical QC settings.

Software & Data Management

The MH-2800D operates via front-panel push-button interface only—no external software, USB connectivity, or data logging capability is included. All operational parameters (setpoint, timer value, mode status) are retained in non-volatile memory during power interruption. For laboratories requiring electronic recordkeeping, users may integrate the thermostat into broader process documentation workflows by recording setpoints, start/stop times, and observed PV values manually in bound lab notebooks or LIMS entries. The absence of networked firmware ensures immunity to cybersecurity vulnerabilities and simplifies IQ/OQ validation under GMP Annex 11 guidelines. Optional accessories include calibrated PT100 probe kits for third-party verification of thermal uniformity across block zones.

Applications

• Enzyme kinetics studies requiring stable incubation at defined temperatures (e.g., restriction digests, ligations, phosphatase treatments)
• Pre-analytical sample conditioning for chromatographic methods—including column pre-heating in AT-series column ovens and mobile phase warming prior to LC-MS injection
• Controlled thermal denaturation of proteins or nucleic acids prior to electrophoresis or immunoassay development
• Standardized drying or solvent evaporation steps in SPE cartridge conditioning and extract concentration workflows
• Calibration support for temperature-sensitive detectors (e.g., thermal conductivity, refractive index) in routine instrument performance checks

FAQ

Does the MH-2800D support RS-232 or USB communication for remote control?
No. The MH-2800D is a stand-alone, manually operated thermostat without digital interface ports or command protocol support.
Can the heating blocks be customized for non-standard tube formats?
Yes—Ottescience offers OEM block machining services upon request; lead time and minimum order quantities apply.
Is the temperature uniformity across the block surface specified?
Uniformity is not formally published but empirically verified to be ≤±0.3 °C across standard block configurations at 100 °C, consistent with ASTM E2209-19 practices for dry block calibrators.
What maintenance is required for long-term reliability?
Annual inspection of heater contacts and thermal paste integrity is recommended; cleaning should be performed exclusively with lint-free cloths and isopropyl alcohol—no solvents or abrasives.
How does the MH-2800D differ from the MH-2800A model?
The MH-2800D adds programmable timing functionality (1–999 min), dedicated TIME indicator LED, and Mode toggle key—otherwise sharing identical thermal specifications, physical dimensions, and block compatibility with the MH-2800A.